/**
 * Software License, Version 1.0
 * 
 * Copyright 2003 The Trustees of Indiana University.  All rights reserved.
 * 
 *
 *Redistribution and use in source and binary forms, with or without 
 *modification, are permitted provided that the following conditions are met:
 *
 *1) All redistributions of source code must retain the above copyright notice,
 * the list of authors in the original source code, this list of conditions and
 * the disclaimer listed in this license;
 *2) All redistributions in binary form must reproduce the above copyright 
 * notice, this list of conditions and the disclaimer listed in this license in
 * the documentation and/or other materials provided with the distribution;
 *3) Any documentation included with all redistributions must include the 
 * following acknowledgement:
 *
 *"This product includes software developed by the Community Grids Lab. For 
 * further information contact the Community Grids Lab at 
 * http://communitygrids.iu.edu/."
 *
 * Alternatively, this acknowledgement may appear in the software itself, and 
 * wherever such third-party acknowledgments normally appear.
 * 
 *4) The name Indiana University or Community Grids Lab or NaradaBrokering, 
 * shall not be used to endorse or promote products derived from this software 
 * without prior written permission from Indiana University.  For written 
 * permission, please contact the Advanced Research and Technology Institute 
 * ("ARTI") at 351 West 10th Street, Indianapolis, Indiana 46202.
 *5) Products derived from this software may not be called NaradaBrokering, 
 * nor may Indiana University or Community Grids Lab or NaradaBrokering appear
 * in their name, without prior written permission of ARTI.
 * 
 *
 * Indiana University provides no reassurances that the source code provided 
 * does not infringe the patent or any other intellectual property rights of 
 * any other entity.  Indiana University disclaims any liability to any 
 * recipient for claims brought by any other entity based on infringement of 
 * intellectual property rights or otherwise.  
 *
 *LICENSEE UNDERSTANDS THAT SOFTWARE IS PROVIDED "AS IS" FOR WHICH NO 
 *WARRANTIES AS TO CAPABILITIES OR ACCURACY ARE MADE. INDIANA UNIVERSITY GIVES
 *NO WARRANTIES AND MAKES NO REPRESENTATION THAT SOFTWARE IS FREE OF 
 *INFRINGEMENT OF THIRD PARTY PATENT, COPYRIGHT, OR OTHER PROPRIETARY RIGHTS. 
 *INDIANA UNIVERSITY MAKES NO WARRANTIES THAT SOFTWARE IS FREE FROM "BUGS", 
 *"VIRUSES", "TROJAN HORSES", "TRAP DOORS", "WORMS", OR OTHER HARMFUL CODE.  
 *LICENSEE ASSUMES THE ENTIRE RISK AS TO THE PERFORMANCE OF SOFTWARE AND/OR 
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 *GENERATED USING SOFTWARE.
 */
package cgl.narada.wsinfra.wsr.storage;

import cgl.narada.wsinfra.wsr.storage.impl.WsrStorageServiceImpl;

/** The WsrStorageService provides accesses to 3 interfaces which cover
    the gamut of storage operations specific to the WSRM protocol. 
    
    @author Shrideep Pallickara, Sangmi Lee and Beytullah Yildiz
    $Date: 2005/05/04 18:05:42 $
    $Revision: 1.3 $
*/

public abstract class WsrStorageService {
    //  private static WsrStorageService wsrStorageService = null;
  private static WsrStorageService wsrSinkStorageService = null;
  private static WsrStorageService wsrSourceStorageService = null;
  private static String defaultConfig = "./config/wsr/ServiceConfiguration.txt";
  private static String moduleName = "WsrStorageService: ";
  
    /* public static WsrStorageService getInstance(String configFileLocation)
    throws WsrStorageException {
  	
    if (configFileLocation == null) {
      configFileLocation = defaultConfig;
    }

    configFileLocation.trim(); //eliminate white spaces
    if (configFileLocation == "") {
      configFileLocation = defaultConfig;
    }
    
    if (wsrStorageService == null) {
       System.out.println("Wsrstorageservice is null so trying to initialize new one");
      wsrStorageService = new WsrStorageServiceImpl(configFileLocation);
      System.out.println("Initialized storage service with info"+wsrStorageService.toString());
    }
    System.out.println("returning storage service");
    return wsrStorageService;   
    }*/

    public static WsrStorageService getSinkStorageServiceInstance(String configFileLocation)
    throws WsrStorageException {
  	
    if (configFileLocation == null) {
      configFileLocation = defaultConfig;
    }

    configFileLocation.trim(); 
    if (configFileLocation == "") {
      configFileLocation = defaultConfig;
    }
    
    if (wsrSinkStorageService == null) {
      System.out.println("WsrSinkStorageservice is null so trying to initialize new one");
      wsrSinkStorageService = new WsrStorageServiceImpl(configFileLocation);
      System.out.println("Initialized storage service with info"+wsrSinkStorageService.toString());
    }
    System.out.println("returning Sink Storage service");
    return wsrSinkStorageService;   
    }

     public static WsrStorageService getSourceStorageServiceInstance(String configFileLocation)
    throws WsrStorageException {
  	
    if (configFileLocation == null) {
      configFileLocation = defaultConfig;
    }

    configFileLocation.trim(); 
    if (configFileLocation == "") {
      configFileLocation = defaultConfig;
    }
    
    if (wsrSourceStorageService == null) {
      System.out.println("WsrSourceStorageservice is null so trying to initialize new one");
      wsrSourceStorageService = new WsrStorageServiceImpl(configFileLocation);
      System.out.println("Initialized Source Storage service with info"+wsrSourceStorageService.toString());
    }
    System.out.println("returning Source Storage service");
    return wsrSourceStorageService;   
    }

  /** This method is used to initialize the storage interfaces and tables
      when the service starts up for the first time or after a scheduled
      downtime or is recovering from an unforeseen failure. This method
      checks for consistencies across the storage and proceeds to initialize
      the ProtocolStorageOperations, SequenceInfoOperations and 
      AuditStorageOperations.  This method throws an exception if there are 
      storage related problems. */
  public abstract void initialize() throws WsrStorageException;
  

  /** Retrieves the reference to the WsrProtocolStorageOperations. This method
      throws an exception if there were problems during the initialization of 
      the StorageService due to inconsistencies or other storage related 
      problems. */
  public  abstract WsrProtocolStorageOperations 
  getWsrProtocolStorageOperations() 
    throws WsrStorageException;


  
  /** Retrieves the reference to  WsrSequenceInfoStorageOperations. This 
      method throws an exception if there were problems during the 
      initialization of the StorageService due to inconsistencies or other 
      storage related problems. */
  public  abstract WsrGroupInfoStorageOperations 
  getWsrGroupInfoStorageOperations() throws WsrStorageException;

}
